There are four cartons 1, 2, 3 and 4 in a Book seller shop. Each carton has text books of different standard viz, 7th, 8th, 9th and 10th and of different subject viz, Biology, English Chemistry and Physics, and even the number of books in each carton is different viz, 50, 100, 150 and 200, but none of these are necessarily in the same order. Each carton contains only one particular subject text books which belong to one particular standard. 

Carton number one contains Physics text books. Carton number two contains 9th standard books but they are neither Biology books nor are they 200 in number. Exactly 200 books of English are in one of the cartons but it is not carton number three. Text books of 10th standard is not in carton number one. 8th standard books are more than 100 but they are not English text books.