If Sample class has a Length property with get and set accessors then which of the following statements will work correctly?

$1$

Sample.Length $=20$;

Sample a $=$ new Sample;

$=.$ Length $-10$;

Console. MriteLine$($Sample Length$)$;

Sample a $=$ new SampleD;

int len;

len $==$ Length;

Sarole a $=$ new Sample;

$.$Length $=$ m$.$Length $+20$;

O a $13$

O b$.245$

O c$.4$ only

O d$.3,5$