They look at the time, when the response was received as well as if there is any delay in receiving the reply.
वो  समय को देखें , जब प्रतिक्रिया प्राप्त हुई थी और साथ ही साथ क्या  उत्तर प्राप्त करने में कोई देरी हुई हैं  ।