Quantitative Aptitude

A diagnostic test for a plant disease is 95% accurate for diseased plants and has a 5% false positive rate for healthy plants. If 2% of plants in a grove actually have the disease, what is the probability that a plant testing positive is genuinely diseased?

Options:

• (A) $\approx 0.279$
• (B) $\approx 0.500$
• (C) $\approx 0.950$
• (D) $\approx 0.125$