Ans Should be 3)
from the given information we can easily conclude it
from clue E , suprita has birthday in april so other 2 will be in sept or june , and now given in clue D , vaibhav has not birthday in sept so remaining one who is anshuman , will have birthday in sept . and vaibhav has in june ..
so suprita in april, anshuman in sept and vaibhav in june ...
Now from clue A , who(vaibhav from above result) born in June , is 7yr old , from clue B , 4yr old who is not anshuman so it will be suprita .. and 2yr old will be anshuman ...
for clear picture from given table