Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cancer patients are often administered biological response modifiers such as -interferon. Reason (R): Tumour cells can avoid detection and destruction by the immune system, and biological response modifiers activate the immune system to help destroy the tumour. In the light of the above statements,

Step-by-step solution

Both Assertion and Reason are correct statements based on NCERT. Tumour cells have been shown to avoid detection and destruction by the immune system. Therefore, patients are given substances called biological response modifiers such as -interferon which activate their immune system and help in destroying the tumour. Thus, the Reason correctly explains why biological response modifiers are administered to cancer patients. Answer: Both Assertion and Reason are true and Reason is the correct explanation of Assertion.