The correct answer is: B. collectively responsible to the assembly.
The Council of Ministers is collectively responsible to the assembly. This means that the entire Council of Ministers must resign if the assembly passes a vote of no confidence in the Council. The Council of Ministers is not individually responsible to the assembly. This means that individual ministers cannot be removed from office by the assembly unless the entire Council of Ministers resigns. The Council of Ministers is not responsible to the Governor. The Governor is the head of state of a state in India, but the Council of Ministers is responsible to the assembly.