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Refer to figure.
In the diagram, the component 1 is a:
  • A
    static inverter.
  • B
    battery.
  • C
    TRU.
  • D
    contactor

Refer to figure.
Component 1 is between the AC BUS 1 and the DC BUS 1. AC BUS 1 is powered with AC from the GEN 1. In order to go from AC to DC you will need a TRU (transformer rectifier unit)

A static inverter does the opposite; converting DC into AC
A battery would not make sense in this place because a battery needs DC to be charged and Component 1 is right after the GEN 1 which provides AC.
Contactor C 5-1 is already on this line, so another would make no sense.

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