Correct option is C
The correct tense form is option (c) Present Perfect Tense.
Explanation (Step-by-step):
• The highlighted verb phrase is “have left”.
• Present Perfect Tense is formed as “has/have + past participle (V³)”.
• In the sentence, “have” is the auxiliary verb used with plural subject “they”, and “left” is the past participle (V³).
• The present perfect indicates an action completed in the recent past with its result relevant to the present (they are now far behind the city).
Grammatical Rule Used (English):
• Present Perfect: Subject + has/have + V³.
Example: I have finished, She has completed, They have left.
Grammatical Rule Used (Hindi):
• Present perfect में संरचना होती है: has/have + verb की third form (V³).
• यह completed action को दर्शाता है जिसका असर वर्तमान में दिखता है।
Why other options are incorrect:
• (a) Past Tense – Past simple would be “left” without “have”.
• (b) Past Perfect – Past perfect would be “had left”.
• (d) Present Tense – Present would be “leave/are leaving”, not “have left”.
So the correct answer is (c)