At a point where the flow undergoes a $20-$degree change in direction, a penstock pipeline is secured by a thrust block. The flow enters through section $1$ with a speed of $6\mathrm{.}8\frac{m}{s},$ and the cross$-$sectional area is $0\mathrm{.}8m.$ The water gage pressure is $13$kPa everywhere in the penstock. If the penstock pipeline weight and water volume of the inside is negligible, the reaction force on the block is the horizonal direction is most nearly:

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$2\mathrm{.}86kN$

$0\mathrm{.}63kN$

$2\mathrm{.}23kN$

$1\mathrm{.}61kN$