Select the correct combination of mathematical signs to replace `**` signs and to balance the following equation:
`(sqrt(121)**9)**5**4**1`

Options

A. `- + xx =`
B. `+ -: xx =`
C. `= + xx -:`
D. none of these

Explanation

`(sqrt(121)-9)+5xx4=1`
`rArr (11-9)+5xx4=1`
`rArr 2+5xx4=1`
`rArr 2+20 ne1`
Option (2) `(sqrt(121)+9)-:5xx4=1`
`rArr (11+9)-:5xx4=1`
`rArr (20)/(5)xx ne1`
Option (3) `(sqrt(121)=9)+5xx4-:1`
`rArr 11 ne 9+20`
Option (4)
`(sqrt(121)-9)xx5+4=1`
`rArr (11-9)xx5+4=1`
`rArr 2xx5+4ne1`