पूछताछ की

questioned

→ पूछताछ
phrase Uncommon #4,227
questioned पूछताछ करना means “to question” or “to make inquiries.” की is used because पूछताछ is grammatically feminine.
HI: पुलिस ने गवाह से पूछताछ की।
EN: The police questioned the witness.

कर अधिकारी ने पूछताछ की।

The tax officer conducted an inquiry.

लालजी शुक्ला से भी पूछताछ की जाएगी।

Lalji Shukla will also be questioned.

— Raat Akeli Hai (2020)

ग्लोरिल्थ घास के बारे में मैंने दोस्तों से पूछताछ की थी।

I asked my friends about Glorilth grass.

सिर्फ पूछताछ की थी उससे।

I had only asked him about it.

— Black Friday (2004)