The correct answer is (d). Executive is accountable to legislature.
In a parliamentary system, the executive branch is drawn from the legislature and is accountable to it. This means that the prime minister and other members of the cabinet must be members of parliament, and they can be removed from office by a vote of no confidence. This system of checks and balances helps to ensure that the executive branch does not become too powerful.
The other options are not correct. (a) Parliament is elected by the people. This is true of both parliamentary and presidential systems. (b) Parliament is a sovereign body. This means that parliament has the power to make laws and to change the constitution. However, this power is not absolute, as parliament is still accountable to the people. (c) Parliament has two houses. This is not true of all parliamentary systems. For example, the United Kingdom has a unicameral parliament, while India has a bicameral parliament.