NEETZoologyLocomotion and Movement
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Myasthenia gravis is characterised by the progressive degeneration of skeletal muscle mostly due to a genetic defect. Reason (R): Myasthenia gravis is an autoimmune disorder that affects the neuromuscular junction, leading to fatigue, weakening and paralysis of skeletal muscle. In the light of the
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
D. (A) is false but (R) is true
Step-by-step solution
Assertion (A) is false because progressive degeneration of skeletal muscle mostly due to a genetic defect is the characteristic of muscular dystrophy, not myasthenia gravis. Reason (R) is true as myasthenia gravis is indeed an autoimmune disorder affecting the neuromuscular junction, which leads to fatigue, weakening, and paralysis of skeletal muscle. Answer: (A) is false but (R) is true