**Explanation:**

The council of ministers is a body of senior government officials that assists the president in making decisions and implementing policies. The president is the head of the council of ministers and has the authority to dismiss its members. However, this authority is not absolute and is subject to certain conditions.

**a) On his own:**
The president does have the power to dismiss a member of the council of ministers on his own. However, this power is not exercised arbitrarily or without any reason. The president can only dismiss a member if there are valid grounds for doing so.

**b) On the recommendation of the prime minister:**
The correct answer to the question is option 'B', which states that the president can dismiss a member of the council of ministers on the recommendation of the prime minister. This means that the prime minister plays a crucial role in the dismissal of a minister. The prime minister, being the head of the government, is responsible for the functioning of the council of ministers. If the prime minister believes that a member is not performing their duties effectively or is engaging in misconduct, they can recommend their dismissal to the president.

**c) Only under emergency conditions:**
Option 'C' states that the president can dismiss a member of the council of ministers only under emergency conditions. However, this is not entirely accurate. While it is true that the president may exercise their powers more extensively during times of emergency, they still have the authority to dismiss a member of the council of ministers under normal circumstances if there are valid reasons for doing so.

**d) With the consent of the speaker:**
Option 'D' states that the president can dismiss a member of the council of ministers with the consent of the speaker. However, this is not accurate. The speaker of the house is a separate constitutional office and does not have a direct role in the dismissal of ministers. The consent of the speaker is not required for the president to dismiss a member of the council of ministers.

In conclusion, the correct answer is option 'B', which states that the president can dismiss a member of the council of ministers on the recommendation of the prime minister. This reflects the important role of the prime minister in the functioning and composition of the council of ministers.

Yes B is the right answer because in India all the main power was given to PM so PM has a main role to give its mendidate to president either member of Council of the minister Dissmiss or not..