Ans 1:
Class : Class 5
The correct answer is A because they are saying the possible largest 4 digit number that is why answer is option A .
Ans 11:
Class : Class 3
A is answer because there is no 9 in the cards . They have asked greatest number from cards.
Ans 13:
Class : Class 7
A is answer because there is no 9 in the cards . They have asked greatest number from cards