Q.Some of the characteristics of Bt cotton are

Step 1. Eliminate option (a). The chapter explicitly lists Bt cotton as 'Ineffective against sucking pests like jassids, aphids and whitefly', so describing it as 'resistant to aphids' directly contradicts the text.

Step 2. Weigh option (b) and (c) against the yield claim. The chapter's stated advantage of Bt cotton is that 'Yield of cotton is increased due to effective control of bollworms' - not a merely 'medium yield' as option (b) claims, and Bt toxins are described as insecticidal mainly to the larvae of moths, butterflies, beetles and cotton bollworms (largely lepidopteran/coleopteran pests), not specifically 'dipteran pests' as option (c) narrowly claims. …

Match each option's claimed pest target and yield description against the chapter's own stated …

• Believing Bt cotton is effective against all insect pests, including sap-sucking pests like aphids, when the chapter explicitly states it is not. …