In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank. Comprehension:
The pattern of birds flocking to Pakhal lake has been observed over several years. So far, (1) ______ than 190 bird species (2) ______ been identified and this is one of the best (3) ______ in the state for bird-watchers to (4) ______ . In fact, we can spot (5) ______ 80 species of birds in a single day.
Select the most appropriate option to fill in blank No.3.