Step 1: Trend:
Melting point in the 3d row climbs to a maximum around the middle (Cr and V) as more unpaired d electrons join in bonding, then drops toward Zn.
Step 2: Look at the unpaired electrons:
Cr: $3d^54s^1$, six unpaired. V: $3d^34s^2$, five unpaired in bonding. Mn: $3d^54s^2$, and its half-filled shell makes d electrons less available. Fe: $3d^64s^2$, four unpaired.
Step 3: Compare values:
Cr is about 2180 K, Mn about 1519 K and Fe about 1811 K. Chromium stands out as the choice with the strongest metal-metal bonding in this list.
Final Answer:
Chromium, option (A), has the highest melting point of the listed metals.
\[ \boxed{\text{Cr (A)}} \]