Explanation:

- Section 86: ?? This section specifically deals with suits against foreign rulers, ambassadors, and envoys. It states that no foreign ruler, ambassador, or envoy can be sued in any court except with the consent of the central government.

- Section 90: This section relates to the procedure for summary suits and doesn't pertain to foreign rulers, ambassadors, or envoys.

- Section 92: Addresses suits concerning public charities and the authority to sue such trusts.

- Section 82: Deals with the execution of decrees against the government or public officers.

Answer: Section 86 is the right option for suits against foreign rulers, ambassadors, and envoys.