Advika took a Croton plant with shaded leaves and set up an experiment as shown here. She kept the plant first in darkness for a few hours and then placed it in sunlight. After 6 hours, she performed iodine test on plucked leaves P, Q and R. Which of the following is the possible outcome? (Note : Shaded portion in the question figure indicates green colour and in the options, it indicates blue-black colour.)
A 
- Leaf Q
B 
- Leaf Q
C 
- Leaf R
D 
- Leaf P
Correct answer is D since the CO2 obsorbent is present in Leaf P.When the outer circle is not present,it does not mean the leaf cannot prepare starch.The picture depiction is confusing.
Ans 8:
Class : Class 8
yes, the answer will be (a) as when we take such a leaf only the green part will be containing starch as it has chlorophyll in it and the other part does not , this is why only the green part will have the ingredients to make glucose(starch)and once iodine is added it turns blue and black