Consider the following statements:1.Carbon fibres are used in the manufacture of components used in automobiles and aircrafts.2.Carbon fibres once used cannot be recycled.Which of the statements given above is/are correct?

1. A

   1 only

   1 only. Carbon fibre is used in auto and aircraft parts. It can be recycled, so 2 is false.

2. B

   2 only

   2 only. Recycling routes exist (pyrolysis, solvolysis).

3. C

   Both 1 and 2

   Both. Statement 2 over-claims.

4. D

   Neither 1 nor 2

   Neither. Statement 1 is standard composites use.

Summary. Official key is (a) 1 only. Carbon-fibre composites are widely used in aircraft and high-end automobiles. End-of-life carbon fibre can be recovered; ‘cannot be recycled’ is false.