The correct answer is option 3 - "1 and 2 only". This means that a citizen of India will lose their citizenship if they renounce Indian citizenship or voluntarily acquire the citizenship of another country.

Let`s break down each option to understand them better:

Option 1: This option states that a citizen of India will lose their citizenship if they renounce Indian citizenship, acquire the citizenship of another country, and marry a citizen of another country. However, this is not entirely correct. Marrying a citizen of another country does not automatically result in the loss of Indian citizenship.

Option 2: This option states that a citizen of India will lose their citizenship if they voluntarily acquire the citizenship of another country, marry a citizen of another country, and criticize the government. However, criticizing the government does not result in the loss of Indian citizenship.

Option 3: This option is the correct answer. It states that a citizen of India will lose their citizenship if they renounce Indian citizenship or voluntarily acquire the citizenship of another country. This aligns with the Citizenship Act of 1955, which specifies these two actions as grounds for loss of Indian citizenship.

Option 4: This option states that a citizen of India will lose their citizenship if they renounce Indian citizenship and criticize