Option 1 states that both the assertion and the reason are true, and that the reason is the correct explanation of the assertion.

The assertion states that the import of Chinese toys was recently banned by the Government of India. This is true, as there have been instances where the Indian government has implemented restrictions or bans on Chinese toy imports.

The reason given for this is that the plastic material used to make the toys is not biodegradable. This is also true, as many plastic toys are made from non-biodegradable materials that can take a long time to break down in the environment.

Therefore, in this case, both the assertion and the reason are true. Additionally, the reason provided does indeed explain why the government banned the import of Chinese toys – because they are made from non-biodegradable materials.

Hence, option 1 is the correct answer.