Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R).
Assertion (A): Cancer cells divide continuously, giving rise to masses of cells.
Reason (R): Tumor formation is due to contact inhibition of neoplastic cells.
In light of the above statements, choose the correct answer from the options given below.

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Both (A) and (R) are true but (R) is not the correct explanation of (A).

Both (A) and (R) are false.

(A) is true but (R) is false.

Both (A) and (R) are true and (R) is the correct explanation of (A).

answer is C.

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Detailed Solution

(A) is true but (R) is false.

Assertion (A) is true. Cancer cells have lost the normal regulatory mechanisms that control cell division, leading to uncontrolled and continuous cell division. This unregulated cell division results in the formation of masses of cells, known as tumors.

Reason (R) is false. Tumor formation is not due to contact inhibition of neoplastic cells. Contact inhibition refers to the phenomenon where normal cells stop dividing when they come into contact with neighboring cells. However, cancer cells often lack contact inhibition and continue to divide even when in contact with other cells, contributing to tumor growth.

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