In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Technical skill ____________ to the ability and knowledge to use the pedagogy, tools and techniques involved in the teaching and research of a specic subject. Ability in programming or software designing and operating a computer is, ___________ instance, a technical skill. There are two things a teacher should understand __________ transformational technical skills. In the rst place, he must know __________ skill and what level of skill should be applied on a particular student. He should be ____________ enough with their potential to ask discerning questions. Secondly, a teacher must understand the role of each event organised and the transformational skill applied, and the inter:relationships between the events and skills.