Assertion(A): Growth is measured by a variety of parameters like an increase in fresh weight, dry weight, length, area, volume, and cell number.
Reason(R): These quantities are proportional to protoplasm.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.