solve the question

Dear student,

All nitrogenous bases found in RNA are not substituted purines as adenine and guanine are purine, and cytosine and uracil are pyrimidines.

Chitin found in the exoskeleton of arthropods is a homopolymer of N-acetylcholine, a derivative of glucose.

Therefore, A is false, and B is true.

​​​​​​​Regards