Golu was advised to go to the Limpopo river by the mynah.

Explanation:

Introduction:
The given question asks who advised Golu to go to the Limpopo river. The correct answer is option 'A', which states that Golu was advised by the mynah bird. Let's discuss the reasoning behind this answer.

Understanding the context:
To answer this question, we need to understand the context and the characters involved. The context is not explicitly mentioned in the question, but we can infer it from the given options.

Option analysis:
Let's analyze each option to determine which one is the correct answer.

a) The mynah: The mynah bird is a type of bird known for its ability to mimic sounds. It is often associated with being talkative or giving advice.

b) His conscience: Conscience refers to a person's inner sense of what is right or wrong. While the conscience can guide a person's actions, it doesn't typically advise a person to go to a specific location like a river.

c) The crocodile: Crocodiles are reptiles known for their aggressive behavior and are unlikely to give advice to someone.

d) Both (a) and (b): This option suggests that both the mynah and Golu's conscience advised him to go to the Limpopo river. However, as discussed earlier, the conscience doesn't typically advise a person to go to a specific location.

Conclusion:
Based on the analysis of the given options, we can conclude that the correct answer is option 'A', which states that Golu was advised to go to the Limpopo river by the mynah bird. The mynah bird is known for its ability to mimic sounds and is often associated with giving advice.