Stress path equation for tri-axial test upon application of deviatoric stress is, $q=10 \sqrt{3}+0.5 p$. The respective values of cohesion, $c($ in $\mathrm{kPa}$ ) and angle of internal friction, $\phi$ are:

(A) 20 and $20^{\circ}$

(B) 20 and $30^{\circ}$

(C) 30 and $30^{\circ}$

(D) 30 and $20^{\circ}$

Stress path equation for tri-axial test upon application of deviatoric stress is, $q=10 \sqrt{3}+0.5 p$. The respective values of cohesion, $c($ in $\mathrm{kPa}$ ) and angle of internal friction, $\phi$ are:

(A) 20 and $20^{\circ}$

(B) 20 and $30^{\circ}$

(C) 30 and $30^{\circ}$

(D) 30 and $20^{\circ}$

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