Which оf these is/аre TRUE оf а PA hаnd radiоgraph.1. There is unequal midshaft concavity on either side of the 2nd-5th phalanges and MCs.2. There is equal midshaft concavity on either side of the 2nd-5th phalanges and MCs.3. 1st digit demonstrates a 45-degree PA oblique projection.4. Distance between the MC heads is equal.