I. The use of pillars or columns is very common in building and bridges. II. A pillar with round...

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I. The use of pillars or columns is very common in building and bridges.
II. A pillar with rounded ends supports less load than that with a distributed shape at ends.

III. Building has to take into account the conditions under the cost and long period, reliability of usable materials, etc.
Which of the following statement(s) is/are correct?
(a) Only I
(b) Both II and III
(c) Only III
(d) I, II and III
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