A. The murderer is to be arrested soon by the police
B. The murderer will have arrested by the police soon
C. The murderer arrested by the police
D. The murderer will be arrested soon by the police
Explanation
Passive voice of Future Indefinite Tense
Firstly, change the structure, so the object in active voice becomes the subject in passive voice. Secondly, use the verb 'to be' in the same tense as the main verb in the active voice. Lastly, use the past participle of the main verb.
The company of soldiers was marching to the borders.
There helping verb was show that the subject فعل is singular due to which we need Singular subject which is The company i.e * Poor is considered Plural The Poor become singular *Rich is aslo plural The rich became singular .....Similarly *Comapy is plural word The company became Singular word