Explanation:

only 2 is correct

• 3rd statement is incorrect because OCI does not have the right to acquisition of agricultural property or hold pubic office
• 1st   statement is incorrect PIO card holders do not require a visa to visit India for a period of 15 years from the date of issuesof the PIO card.
• Overseas Citizenship of India allows holders to visit the country at any time for any length of time and for any purpose.
• However OCI card holders desirous of visiting India for the purpose of conducting research must obtain separately a No Objection/Research Project Clearance Certificate from Ministry of Home Affairs (MHA),
• India and that can applied at nearest Indian Diplomatic Mission. This includes Scholars awarded Scholarship under Fulbright or any other scheme.
• Overseas citizens of India will not enjoy the following rights even if resident in India: (i) the right to vote,(ii) the right to hold the offices of President, Vice-President, Judge of Supreme Court and High Court, Member of Lok Sabha, Rajya Sabha, Legislative Assembly or Council,(iii) appointment to Public Services (Government Service). Also, Overseas Citizens of India are not eligible for an Inner Line Permit, and they have to apply for a protected area permit if they want to visit certain areas in India.
• Though not actual dual citizenship, the privileges afforded by acquiring an OCI card is that now multi-national companies are finding it simpler to hire the OCI cardholders, who enjoy a multiple entry, multi-purpose lifelong visa to visit India.
• The card provides a lifelong visa to the holder, sparing them the need for permits.
• OCI holders are treated on par with NRIs for economic, financial and educational matters and only don’t have political rights and rights to buy agricultural and plantation properties or hold public office.