Identifying correct metal properties

Steps:

• Statement 1: True, as all metals conduct electricity due to delocalized electrons allowing current flow.
• Statement 2: False, since outermost electrons vary; group 1 metals (e.g., sodium) have 1, not 2.
• Statement 3: False, as some metals like mercury (-39°C) and cesium (28°C) have low melting points.
• Only statement 1 holds, but no option matches "1 only."

Why A is not correct:

• Includes false statement 2, ignoring valence electron variation in the periodic table.

Why the others are wrong:

• B includes false statement 3, as melting points are not uniformly high.
• C includes both false statements 2 and 3.
• D includes all three, two of which are false.

Final answer: None of the options