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Consider the following structure chart diagram. The boxes have function names embedded in them, while the variables are indicated along the arcs.

GATE2006-IT_59

Given below are a set of statements relevant to the above diagram.

  1. F3 and F6 can be in the same module.
  2. F4 and F6 can be in the same module.
  3. A4 is both an output and a control variable.
  4. It is incorrect to pass A1 as data and use it as a control variable.

Which combination of these statements is TRUE?

  1. III and IV
  2. I and IV
  3. II and IV
  4. I, II and IV
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