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Which of the following statements is false?

AMeasuring tape is not suitable to measure the girth of a tree.
BA suitable measuring device is must to measure the length of an object.
CIn ancient India, small length measurements used were an angul or a mutthi.
DElectric trains, monorail, supersonic aeroplanes and spacecrafts are some of the 20^th century contributions.

A point source of light S, placed at a distance 1 m in front of the centre of a plane mirror of width 2 m, hangs vertically on a wall. Rahul walks in front of the mirror along a line parallel to the mirror at a distance 2 m from it as shown in the figure. The greatest distance over which he can see the image of the light source in the mirror is


A5 m
B9 m
C12 m
D6 m

Refer to the given Venn diagram. Which letter in it best represents "nitrogen gas"?


AP
BQ
CR
DS

Rohan is going to school with his father by car. He decides to note the readings on the odometer of the car after every five minutes till he reaches the school. The given table shows the odometer readings of his journey.

The given figure shows steps involved in the process of wool yarn making. Identify steps a, b, c, d and e and select correct option regarding them:



A In many parts of the world, step 'a' is done once a year. It harms the sheep and is painful.
B Steps 'b and c' show the process of scouring, during which workers are at high risk of getting respiratory diseases.
C Step 'd' converts wool fleece into narrow untwisted fibres called slivers.
D Step 'e' depends on the length of the fibres. Long fibres are used for making tweeds and flannel whereas short fibres are used in making gabardines.

Mishika looked at the sky at night and noticed that there was in the sky. It was her birthday, i.e., 7^th January. Her brother, Mohit's birthday falls exactly two weeks after her birthday. Which shape of Moon would she most likely observe on her brother's birthday?

A
B
C
D

The given box contains some letters. Name of which of the following can be obtained using these letters? (You can use each letter more than once.)

Kavita wants to push her cart up the plank. Which of the following planks will be most difficult for her to push the cart up?

A
B
C
D

Refer to the given dichotomous key and select the correct option.
I. a. Its edible part grows above ground. - Go to II
b. Its edible part grows below ground. - Go to III
II. a. It has reticulate venation in leaves - P
b. It has parallel venation in leaves - Q
III. a. It has tap root system - R
b. It has fibrous root system - S

A P could be coriander whereas R could be radish.
B Q could be potato whereas S could be onion.
C Q could be maize whereas R could be wheat.
D P could be mustard whereas S could be pea.