The correct answer is D. English, Hindi or mother tongue.
The Members of Parliament (MPs) can express themselves in the House in English, Hindi or their mother tongue. This is in accordance with the 10th Schedule of the Constitution of India, which provides for the use of languages in Parliament. The Schedule states that “the official languages of Parliament shall be Hindi and English” and that “any member may speak in any language, but the presiding officer may direct that his speech shall be translated into Hindi or English, as the case may be”.
The use of languages in Parliament has been a matter of debate for many years. Some MPs have argued that Hindi should be the sole language of Parliament, while others have argued that English should be the sole language. The 10th Schedule was a compromise between these two positions.
The use of languages in Parliament is important because it allows MPs to express themselves in a language that they are comfortable with. This is important for the effective functioning of Parliament.