Subject :IMO Class : Class 8

Which of the following options is TRUE?

A Square of any odd number can be expressed as the sum of two consecutive positive integers.

B Square of any natural number can be expressed as the sum of successive odd numbers starting from 1.

C For any natural number *m* > 1, 2*m*, *m*^{2} – 1 and *m*^{2} + 1 form pythagorean triplets.

D All of these