Directions: In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

There is nothing more (1)_________ than when you sit down at your table to study with the most sincere of intentions and instead of being able to finish the task at hand you find your thoughts (2)_________. However, there are certain techniques that you can use to (3)______ your concentration. To begin with, one should (4)______ to create the physical environment that is conducive to (5)_____ thought.

Select the most appropriate option to fill in blank no. 3.