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Which statement issues a lock on tables?

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Which statement issues a lock on tables?

(a) ISSUE LOCK

(b) LOCK ISSUE

(c) LOCK TABLES

(d) ISSUE LOCKS

I had been asked this question during an online exam.

Question is from Scheduling and Locking Issues topic in section Query Optimization of MySQL

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Best answer
Right choice is (c) LOCK TABLES

To explain I would say: Locks can be acquired and released explicitly by issuing LOCK TABLES and UNLOCK TABLES statements. Normally the server’s lock manager automatically acquires locks as necessary and releases them when they no longer are needed.

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