Choose the correct option to fill in the blank in the given sentence:…

The correct answer is Option (4) → has been issued

Present perfect passive (has been + past participle):

• An ordinance does not issue itself; it is issued by the government. The subject receives the action, so the verb must be passive (be + past participle).
• "An ordinance" is singular, so the helping verb is has, not "have" or "are".
• The present perfect has been issued shows an action just completed whose result holds now: the ordinance is out and must be obeyed at once.
• Complete sentence: An ordinance declaring President's rule in the state has been issued for immediate compliance after assessing the law and order situation.
  Example: A warning has been issued to all fishermen not to go out to sea.

Why the Other Options are Incorrect?

Option 1: are issued — Incorrect. "Are" is plural and does not agree with the singular subject "an ordinance".

Option 2: had issued — Incorrect.

• It is active: it makes the ordinance the doer of "issued".
• The past perfect needs an earlier past action to refer to; there is none here.

Option 3: issue — Incorrect.

• It is active, as if the ordinance itself issued something.
• A singular subject in the present would need "issues", not "issue".