It is possible to produce algae-based biofuels, but what is/are the likely limitation(s) of developing countries in promoting this industry?1.Production of algae-based biofuels is possible in seas only and not on continents.2.Setting up and engineering the algae-based biofuels production requires high level of expertise/technology until the construction is complete.3.Economically viable production necessitates the setting up of large-scale facilities which may raise ecological and social concerns.Select the correct answer using the code given below:

1. A

   1 and 2 only

   (a) 1 and 2 only. Statement 1 is false: algae can be grown in inland ponds and photobioreactors, not only in the sea. Not the key.

2. B

   2 and 3 only

   (b) 2 and 3 only. High technical skill is needed to engineer production, and viable plants tend to be large, with ecological and social costs. Statement 1 is wrong. This is the official key.

3. C

   3 only

   (c) 3 only. Scale and social-ecological concerns are real, but statement 2 is also a limitation. 3 only is incomplete.

4. D

   1, 2 and 3

   (d) 1, 2 and 3. The seas-only claim is incorrect, so all three fails.

Summary. Official key is (b) 2 and 3 only. Algal biofuel is not confined to the ocean; raceway ponds and closed reactors work on land. Developing countries still face a high expertise barrier until facilities are built, and commercial scale can crowd land, water and coasts, raising ecological and social issues. Statement 1 is the trap. Third-generation biofuel is the neighbouring label for algal fuel.